Sentences with phrase «containing egg cells»

Williams contends that these innovations took hold at least 125 million years ago and made it possible for early angiosperms to evolve more flexible and sheltered modes of fertilization, including ovaries containing egg cells deep inside the plant.

Torenia fournieri is unique in that the egg apparatus, containing the egg cell and the two synergid cells, protrudes from the ovule.

Not exact matches

A fertilized human egg cell does not contain a homunculus, but neither is it a structureless drop of viscous liquid.

The DNA in the nucleus of the fertilized egg contains all the instructions needed to make all the different proteins and all the different sorts of structures in all the different sorts of cells in the body.

If you are having a girl, her ovaries now contain primitive egg cells; about six million (approximately six times the number she'll have at the time of birth).

Nursing mothers can also eat more egg yolk and butter which contains arachidonic acid, a critical ingredient, which facilitates the formation of junctions between skin cells, keeping them firm.

Both egg and embryonic cells contain a great deal of water.

They made these clones by a process called automatic parthenogenesis: The egg is formed normally (with half the species» usual number of chromosomes), then fertilized by the «polar body,» a cell that is created during oogenesis and contains the same gene copies as the egg, resulting in the shark having half the genetic variation of its mother.

As a result, the follicle, which contains the ovarian cells and the egg, gets bigger, estrogen levels rise, and the egg matures.

For some reason their eggs contain the same 44 chromosomes as their body cells — 22 from the mother and 22 from the father — instead of half, and so the eggs can grow into gecko hatchlings without first being fertilized by sperm.

Before birth, mouse and human ovaries contain an abundant supply of germ cells, some of which will develop into the eggs that will ultimately be released from follicles during ovulation.

Around the time of birth these germ cells have formed a large reserve of primordial follicles — each containing a single immature egg.

The scientists removed the DNA - containing nuclei from the eggs and replaced them with DNA from the donor skin cells.

Harvard Medical School reproductive biologist Jonathan Tilly made headlines in March when he suggested mammalian ovaries contain stem cells that give rise to new potential eggs, or oocytes, throughout adulthood.

Oogenesis, the biological process of making an egg cell, typically also yields a polar body — a mini ovum of sorts, containing a duplicate copy of egg DNA.

The team then carefully inserted mouse follicles — spherical structures containing a growing egg surrounded by hormone - producing cells — into these «scaffolds.»

The traditional way to reprogram a cell is to remove its nucleus, which contains the DNA, and inject it into an unfertilized egg that has had its own nucleus removed — in other words, cloning.

Doctors take the cytoplasm of a youthful and healthy egg — containing not the dna but the proteins and enzymes for healthy cell growth — and inject it into the problematic egg to boost its quality.

The human body contains trillions of cells, all derived from a single cell, or zygote, made by the fusion of an egg and a sperm.

And so they have long sought haploid embryonic stem cells, which can become any kind of tissue but contain just one set of genes, like a sperm or egg.

The finding that normal fertilization can result in embryos containing cells with different parental sets of chromosomes is a new mechanism for chimerism, which was previously thought to occur only as the result of fertilization errors, for example, the fusion of multiple sperm or eggs to form an embryo.

The mature ovule in most flowering plants, including Arabidopsis thaliana, contains a seven - celled embryo sac consisting of two synergid cells, one egg cell, one central cell and three antipodal cells.

In somatic cell transfer, the nucleus of an egg is replaced with the nucleus from another cell that contains the full genetic information of an individual.

But he adds that if human parthenotes routinely contain as many genetic mismatches as the Korean cells, the number of eggs needed to create such a bank could be prohibitively large.

Developmental biologist Goro Yoshizaki of Tokyo University of Marine Science and Technology in Japan and his colleagues set out to see whether spermatogonia — male germ cells that give rise to sperm — might contain a subpopulation of cells with stem cell - like activity that can develop into either sperm or eggs.

Her mother's skin cell was put in another sheep's egg, which no longer had its own DNA - containing nucleus.

«Conventional techniques of producing transgenic animals, such as microinjection of genes into eggs and the retroviral transduction of genes into embryos, often produce many animals that are mosaic, which means they do not contain the foreign gene in all their cells.

Scientists long believed that the fungal pathogen Candida albicans was incapable of producing haploid cells — which contain only one copy of each chromosome, analagous to eggs and sperm — for mating.

After an extended number of cell divisions, random segregation of mitochondria may lead to cells containing a majority of mitochondria from the donor egg.

Stem Cells have also been shown to be present in the human ovary, so it is quite possible that they can be transformed into eggs by Growth Factors contained in the individuals» own white blood cells and platelets which have been injected into the oCells have also been shown to be present in the human ovary, so it is quite possible that they can be transformed into eggs by Growth Factors contained in the individuals» own white blood cells and platelets which have been injected into the ocells and platelets which have been injected into the ovary.

The fats contained within also clog the ventricles, decreasing the oxygen supply to the sexual organs and preventing the spleen from creating a sufficient amount of leukocytes (white blood cells), which makes the formation of sperm and eggs difficult.

One egg also serves up around 200 milligrams of brain - loving cholesterol and contains the valuable vitamins A, K, E, D, B - complex and minerals iron, phosphorus, potassium and calcium.10 Choline, another egg - nutrient, is a fatty substance found in every living cell and is a major component of our brain.

Each Jarro - Dophilus EPS vegetarian capsule contains 5 billion viable cells and is free of wheat, egg, gluten, nuts, and fish / shellfish.

Plus, the yolks in eggs contain lecithin, a phospholipid that protects your cells.

Egg white contains proteins that dry out pimples and help in rebuilding the skin cells (10).

Our writer investigates the benefits of using skin care products that contain plant - derived stem cells — and non-embryonic human cells extracted from consenting egg donors (seriously).

A sample of the ear discharge may then be viewed under a microscope to determine if it contains bacteria, white blood cells, yeast, fungi, ear mites or ear mite eggs.